valve spring/exhaust question
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Car: 1988 firebird trans am GTA
Engine: 5.7L w/hsr
Transmission: 700r4
Axle/Gears: posi 3.23
valve spring/exhaust question
If i put in an exhaust cutout for the occasional trip to the track, will i have to worry about having enough backpressure for the exhaust valves to function correctly? the engine has only around 20k (acdelco reman). i have been told (not sure if its accurate) that the factory springs require a certain level of back pressure to return to the closed position.
thanks,
Jason
thanks,
Jason
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: valve spring/exhaust question
You'll be fine, dont worry about that.
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